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/*
* Copyright (C) 2015 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef AAPT_SCOPED_XML_PULL_PARSER_H
#define AAPT_SCOPED_XML_PULL_PARSER_H
#include "XmlPullParser.h"
#include <string>
namespace aapt {
/**
* An XmlPullParser that will not read past the depth
* of the underlying parser. When this parser is destroyed,
* it moves the underlying parser to the same depth it
* started with.
*
* You can write code like this:
*
* while (XmlPullParser::isGoodEvent(parser.next())) {
* if (parser.getEvent() != XmlPullParser::Event::StartElement) {
* continue;
* }
*
* ScopedXmlPullParser scoped(parser);
* if (parser.getElementName() == u"id") {
* // do work.
* } else {
* // do nothing, as all the sub elements will be skipped
* // when scoped goes out of scope.
* }
* }
*/
class ScopedXmlPullParser : public XmlPullParser {
public:
ScopedXmlPullParser(XmlPullParser* parser);
ScopedXmlPullParser(const ScopedXmlPullParser&) = delete;
ScopedXmlPullParser& operator=(const ScopedXmlPullParser&) = delete;
~ScopedXmlPullParser();
Event getEvent() const override;
const std::string& getLastError() const override;
Event next() override;
const std::u16string& getComment() const override;
size_t getLineNumber() const override;
size_t getDepth() const override;
const std::u16string& getText() const override;
const std::u16string& getNamespacePrefix() const override;
const std::u16string& getNamespaceUri() const override;
bool applyPackageAlias(std::u16string* package, const std::u16string& defaultPackage)
const override;
const std::u16string& getElementNamespace() const override;
const std::u16string& getElementName() const override;
const_iterator beginAttributes() const override;
const_iterator endAttributes() const override;
size_t getAttributeCount() const override;
private:
XmlPullParser* mParser;
size_t mDepth;
bool mDone;
};
} // namespace aapt
#endif // AAPT_SCOPED_XML_PULL_PARSER_H
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